Murata, a college student living alone, suffers from a designated intractable disease that has paralyzed both of his hands, requiring him to receive home care. The caregiver dispatched to him is Oshikawa, a beautiful but incredibly blunt woman. A one-week live-in care period begins. Murata's condition is such that if he doesn't ejaculate once every hour, he is struck by a severe headache. Due to side effects, he cannot use his hands and is unable to masturbate. Upon hearing the situation, Oshikawa nods indifferently with a stone-faced expression. "...It's part of the job. No problem." A perfectionist, she takes Murata's erection in her hand while maintaining a cold gaze and begins to stroke it precisely. She was supposed to assist his ejaculation purely as a business matter, without any emotion or sweetness, but...